ZT Gearbox Main Seal

ZT Gearbox Main Seal

The ZT Gearbox Main Seal is a critical replacement component for concrete mixer drum drive systems. Designed to fit Continental and ZT brand gearboxes, including the PM85, PM90, and PML90 models, this seal maintains fluid integrity within the gearbox while blocking out harsh contaminants like cement dust and water. Regular replacement of the main seal during gearbox rebuilds or maintenance intervals is essential to prevent catastrophic bearing failure and extend the operational life of the mixer drive.

Key Features

• Direct replacement main shaft seal for Continental and ZT mixer gearboxes
• Prevents hydraulic fluid leaks from the main output shaft
• Protects internal gearbox bearings from concrete, dust, and moisture ingress
• Compatible with both front and rear discharge mixer applications

Fits These Mixers

ZF, Rex, PMP, Challenge, Bonfiglioli. Fits ZT and Continental mixer gearboxes, specifically models PM85, PM90 (part 10771700), and PML90 (part 10777700EX). Also compatible with select ZF drum drive gearbox PK-5100. Commonly found on Continental and Indiana Phoenix front and rear discharge mixers.

All measurements ± standard manufacturing tolerance.

Product descriptions are drafted with automated tools and reviewed as time allows. While we work to keep them accurate, specifications and fitment should be confirmed with a Customer Service specialist at 800-745-3414 before purchase. Found an error? Let us know and we’ll fix it.